High-potential insulator.



i To all whom it may concern.-

' UNITED STATES TENT ormon.

LoUrssrEmnnaesn, OF NEW YORK, n. Y.

- Be it known-that I, LOUIS STEINBERGER, a citizen of the United. States, and a resident of the city 'of New York, borough of Brooklyn, in. thecounty of Kings and. State of New York, have invented a new and Improved High-Potential Insulator, of which the following is a full, clear, and exact description.

Myinvention relates to high-pqzential insulatorsf and admits of general use, but is of peculiar. service .upon transmission-lines employed for conveying currents of highpotengal fromf-one point to another distant there- Among theseveralobjects of my invention are the following: first, to, give the insulator such conformity as to presenta number of i abruptangles'in order to reduce to a minithe leakage from the conductor to the insulator-support; second, to provide a clearanee-space'of such conformity as not to be readily rendered moist; third, to give certain occur.

parts of. the insulator such shape that the wind is unable to blow rainor other moisture against certain portions of .the insulator;

'fourth,.to confer upon the insulator as awhole a degree 'ofz'str'ength commensurate withthe use of metal, but without proportionate danger of allowing an arc to form; fifth, to enable theinsulator to be used successfully upon a pin of insulating material, such as wood or electrose;-sixth, to use a metallic sleeve which is completely covered by insulating material; seventh,- to firml anchor one of the hoods totherhetallic s eeve; eighth, to afford certain advantages in the matter of d etaching and assembling, the hoods, and, ninth, to provide the insulator-with a gasket so disposed as to increase'the length of the path across which leakage. or an arc is likely to Reference is to be had to the accompanying drawings, forming a part of this specification, in WhlCl'). similar characters of, reference indicate corresponding parts in all the figures;

. Figure 1 is a plan view ofmy high-poten-.

tial insulator complete.

Fig. 2 is a vertical section through the same upon the line 2 2 of Fig. 1 looking in the direction of the arrow. Fig. 3 is a horizontal section upon the line 3 3 of Fig. 2 looking in the direction of the arrow and showing the angular anchorage 11. i Fig. 4 is a vertical section through the sleev'e 10 and anchorage ll, and Fig. 5 is a front eleva- HIGH-POTENTIALlNSULATOR.

Pa.tent ed Oct. 23,1906.

tion of the supporting-pin of wood or other 515 insulating material.

'1 he supporting-pin is shown at 6 and is provided with an enlarged disk-like portion 7, from the upper edge of which projects an annular bead 8, and within this annular bead is '60 a threaded stem 9, integral with the enlarged. portion 7 and body portion 6. "i-he support ing-pin is made, preferably, of insulating material, suchgas wood, elect'rose, or hard rub-hen.

niounte 1 upon the threaded stem 9 is a sleeve.- 6451'. p

10, provided with a bead 11, servingas an an-- ported by a neck 26.

chorage, theouter periphery of which beadis; angular, as shown in Fig. 3, the ,bead being integral with the sleeve. lhe. sleeve is p'ro-,- vided internally with an aperture 14 for en? 77a gaging the threaded stem 9. The sleeve 10 18 also provided with a closed end'12 and with, a threaded portion 13, the -rest of theexternal portionof the sleeve being smooth, as indi-. cated in Fig. 4. Molded rigidly upon the smoothpor'tion of the sleeve 10 and engagedby the angular bead 11 is a hood 15, of insulating material, provided with an annular bead 17,- which has an annular inner face 16 and an annular outer face 18, as indicated in Fig. 2. Above thev bead 17 is an annular ledge or step 19, perfectly horizontal. and forming an abruptan-j gle with this ledge is an annular ortion 20, provided with another annular le ge 21, and above this last-mentioned ledge is another. annular bead 22. The arrangement is such. that the upper surface of the lower hood presents a number of successive, annular concen-. tric steps. The upper hood 23 is provided with a head 24, having a slot 25, whichis sup- The lower portion of the upper hood terminates in an annular bead 27 and is provided with an annularllat surface 28, which is met at an angle by an annu 9 5" lar surface 29, and the latter isinturn similarly met by ahorizontal surface-30, so as to, form a series of annular concentric steps or ledges, separated from each other by abrupt vertical portions. Theextreme outer edge 106 of the upper hood terminates in a bevel 31, and below this bevel is an annular clearance:

space 32 and apair of concentric petticoats 33, separated by an annular space 35. An-.

' other clearance-space 36, having an abrupt. res angular form, is mounted over the lower-hood v 15, and in contact with the annular'bead 8 1s a gasket 37, of soft rubber, upon which the;

- distance beyond t e petticoat 33. This pro l ection serves in a measure to protect this pet- 'ticoat- 33 and other parts of the insulator against the danger of chipping and is of spe cial value in cases where the insulators are to be shipped from one point to another.

My invention is used as follows: The sleeve carrying the lower-hood 1 5, is screwed upon the threaded stem- 9. The washer or gasket 4 37 is laid upon the annular bead Sand is forced rigidl into the annular recess when the sleeve is riven into its lowermost position UponJ-the threaded portion 13 of the sleeve is nex-t'screwed theup er hood 23, so that the two-hoods interloc firmly together. If

3 desired, the insulator may be assembled'before being mounted upon thesupporting-pin. This is done by merely screwing the upper hood 23 upon the lower hood 15, so that the two-parts practically constitute a single member and may be handled in the same manner as any other insulator. 1 In order to mount theinsulator upon the supportingin, it issimply lacedin such position that t e sleeve I 10 can e screwed upon the stem .9 and the insulator as a whole is caused to revolve until it reaches its lowermost position, binding the 35.

-gasket 37 upon the annu ar head 8.

Itake advantage of the fact that if an insulating member be given such conformity as .;to present a number of successive steps or ledges making abrupt angles with other portions, so as to break the continuity of the surface, the dielectric qualities of the insulator are greatly improved.' It will be observed,

' that if the bevel 31 be given such position as that boundary.

creeping across.

space 35 and the petticoat 34 being sep'a-..

rated from the main body portion of the insulator by means of clearance-spaces, also-tends to prevent the creeping of moisture. My theory is that moisture-such, for instance, as that produced by rain or .dew or f0 tends to creep along a surface untilit reac es an abrupt boundary, but tends to stop at Of course if there be anumber of concentric steps or ledges disposed horizontally the water may accumulate upon them to some extent owing to surface ten- ;stantially vertical.

sion in not allowing it to away as freely as might be desired; but in such cases'there is comparatively little chance for any moisture to cling upon the portions which are sub- One reason is that water u on the'vertical 1 portions is subjected more directly to the in uence of gravity."

' I do not limit myself in every instance to the particularform of insulator herein shown.

Neither do I limit myself to use in every instance a pin of the form here shown nor to have'same in every case of insulating material, as certain. changes and combinations known-to those skilled in theart may be effected without departing from the scope or spirit of my invention.

Having thus described my invention, -I

claim as new and desire to secure by Letters Patent-'- 1. A high-potential insulator, comprisin a supporting-pin provided with an enlarge portion and with an annular bead projecting from said portion, a gasket-of soft rubber enga 'ng sa d annular bead, and a hood pro-' vid ed with means whereby it may be secured to said enlargedportiomsaid hood being 'pro- 'vided with a portion integral therewith for engaging" said gasket. 3',

' 2.. high-potential insulator, comprisin a supporting-stem provided with an enlarged portion and with an annular bead projecting slightly from said enlarged portion, a metallic member dis osed concentric to said annular bead, and a. ood connected with said metallic member and provided with an annular channel into which said head projects.

3.'. AI high potential insulator, comprising a pluralit of hoods engaging each other, a metallic s eeve engaging each of said hoods and connecting the same firmly together, said sleeve being provided with a surface flush with the surface of one of said hoods, and a sup orting member fitting a ainst said sleeve and also fitting against t e ood so as to avoid exposure of said sleeve.

4. A high-potential insulator, comprising a supporting-stem provided with an enlarged. portion and with a threaded portion concentric thereto and extending directly therefrom, said enlarged ortion being provided with an annular beac encirclin said stem, a-

ring-pin' provided with a body portion having an enlargement, and with an annular bead rojectmg from'sa d enlar ement, said annuar bead having a surface or entering an annular channel, said pin being further pro- ,vided with a stem lntegral therewith and concentric to said annular bead.

' 6. In a high-potential insulator, the combination of a pin of insulating material proiiiiaporting-pin provided with an enlarged portion and with. a member projecting upwardly therefrom, a sleeve encircling said member and resting upon said enlarged portion, and a hood encircling said sleeve and rovided with-a portion engaging said enl arged portion of said pin.

\ 8. As an article of manufacture, an insulator-pin consisting o fa body portion made 3 of insulating material and provided with an enlarged portion, said body portion being further provided with an annular bead integral therewith and projecting upwardly therefrom for the purpose of engaging an insulator.

9. In a high-potential insulator, the combination of a hood provided at its base with an annular groove, a resilient member within said groove, and a pin provided with means for engaging said hood, and with an annular projecting portion engaging said resilient member. 7

10. A high potential insulator, comprising a supporting-pin of insulating material provided with an enlarged portion, and with a member rojecting upwardly therefrom, a metallic sleeve encircling said last-mentioned member, and a hood of insulating material I surface engaging said meta encircling said sleeve and molded" thereupon, said hood being provided with a surface di rectly en aging the surface of said enlarged portlon 0 said pin.

-11. A highotential insulator, comprising a plurality of oods, each provided with concentric ledges whereby said hoods are fitted together, a metallic sleeve engaging said hoods, said ledges being in contact with each other, anda supporting-pin. rovided with a iiic sleeve, said surface being in direct engagement with. one

of said-hoods.

12. A high-potential insulator, comprising a plurality of hoods rovided with concentric ledges whereby said oods are fitted together, a metallic sleeve anchored permanently upon .one of said. hoods and detachably engaging the other, and a supporting-pin provided with a surface engaging said metallicsleeve.

13. A high-potential insulator, com a pin of insulating material, a lura ityof hoods provided with stepped su rising ing each other directly, engaging said hoods for the purpose of connecting' the same together, said sleeve being detachably connected with one of said hoods and being ermanently anchored relatively to another iiood.

14.. A high-potential insulator, comprising a plurality of hoods, a supporting-pin there for, and a metallic sleeve bedded within one of said engaging said sup ortings ing completely inc osed at said hoods and said pin.

15. A highotential insulator, comprising a hood of insu ture extending therethrough, a supporting member permanently secured within said aperture and having a portion extending therefrom, a second hood connected to said extended portion of said supporting member, and a pin engaging said member.

16. A highotential insulator, comprising a hood of insufating material having an aperture extending therethrough, and a supportein partially emhoods and directly in, said sleeve beoth of its ends by and a metallic sleeve ating material having an apering member permanently secured within said aperture.

17. A highotential insulator, comprising a hood of insu ating material having an aperture extending therethrough, a member permanently secured within said a erture and having a portion extendingthere om, a supporting member mounted u on said portion thus extending and rovided with a portion for supporting a con uctor, and a pin of insulating material engaging said member first mentioned.

18. A highotential insulator, comprising a hood of ins ating material having an aperture extending therethrough, a member permanently secured within said a having a portion extending there om, a hood supports upon said portion thus extending,

IOO

ert ure and and means for mounting said firstmentioned hood.

.19. As an article of manufacture, an insulator-pin consisting of a body member provided with an enlarged portion, said bod member being further provided with an annular-bead integral therewith and projecting upwardly therefrom for the purpose of engaging an insulator.

20. A high-potential insulator, com a hood of insulating material provide its exposed surface with races of different diameters, said hood having an aperture extending through it, a member permanently mounted within said aperture, said member being provided with means whereby it may be sup orted.

21. A high-potentia insulator, comprising a hood of insulating material and provided rising upon upon its outer surface witha plurality of terraces of difierent diameters, said hood being acesengag ,1 further provrd'edwitlpan aperture extending a plurality of ter r lator-pin comprising a body member pro In testimony whereof I have signed' my name to this specification in the presence of 10 two subscribing; witnesses. l

l LOUIS- STEINBERGE'R.

vided with a thread and With a portion ex- Witnesses:

tending laterally, said portion having an an- JNo. BITTER,

nular member integrally mounted thereupon. I WALTON HARRISON.

through it, a hollow member permanently secured Within said aperture, and means for supporting said'hollow member.

22. As an article of manufacturaaninsu- 

